Question

What is the depth of core ,mantle, crust

Answer 1

It is approximately 3,950 mi (6,370 km) from Earth's surface to its center. Geologists understand the structure and composition of the surface by direct observation and by analysis of rock samples raised by drilling projects; however, the depth of drill holes and, therefore, the depth limit of scientists' ability to directly observe Earth's interior is severely limited. Even the deepest drill holes (7.5 mi [12 km]) penetrate less than 0.2% of the distance to Earth's center. Thus, we know more about the layers near Earth's surface than about the depths, and can only investigate conditions deeper in the interior through indirect means

Answer 2

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• Crust => ɪᴛ ɪs ᴛʜᴇ ᴏᴜᴛᴇʀᴍᴏsᴛ ʟᴀʏᴇʀ ᴏғ ᴛʜᴇ ᴇᴀʀᴛʜ's sᴜʀғᴀᴄᴇ. ɪᴛ ᴇxᴛᴇɴᴅs ғʀᴏᴍ 5 ᴛᴏ 8 ᴋɪʟᴏᴍᴇᴛʀᴇs ʙᴇɴᴇᴀᴛʜ ᴛʜᴇ ᴏᴄᴇᴀɴs ᴀɴᴅ ᴀʙᴏᴜᴛ 35 ᴋɪʟᴏᴍᴇᴛʀᴇs ʙᴇɴᴇᴀᴛʜ ᴛʜᴇ ᴄᴏɴᴛɪɴᴇɴᴛᴀʟ ᴍᴀssᴇs.
• Mantle => ɪᴛ ɪs ᴛʜᴇ ʟᴀʏᴇʀ ᴛʜᴀᴛ ʟɪᴇs ʙᴇʟᴏᴡ ᴛʜᴇ ᴄʀᴜsᴛ. ᴛʜᴇ ᴛʜɪᴄᴋɴᴇss ᴏғ ᴍᴀɴᴛʟᴇ ɪs 2,900 ᴋɪʟᴏᴍᴇᴛʀᴇs.
• Core => It is the innermost layer of the Earth  and is 3,500-kilometres thick.